"The M5 is purposely built for a fast, powerful, 'College' sedan."
Once upon a time this might have been a niche to fill for the M5. Today BMW already fill it more than sufficiently with not one but three other cars. The 550, 650GC and the 750. Personally I want more from an M car than just being fast, powerful and executive like it's non M siblings and would like to see it move closer to the rest of the M family.